Humidifier



FIG. 1 is a top perspective view of a humidifier showing my new design.

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a top plan view thereof.

FIG. 5 is bottom plan view thereof.

FIG. 6 is a left side elevational view thereof.

FIG. 7 is a right side elevational view thereof. 

The ornamental design for a humidifier, as shown and described. 